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We report the results of our radio, optical and infra-red studies of apeculiar radio source 4C~35.06, an extended radio-loud AGN at the center ofgalaxy cluster Abell 407 ($z=0.047$). The central region of this cluster hostsa remarkably tight ensemble of nine galaxies, the spectra of which resemblethose of passive red ellipticals, embedded within a diffuse stellar halo of$\sim$1~arcmin size. This system (named the `Zwicky's Nonet') provides uniqueand compelling evidence for a multiple-nucleus cD galaxy precursor.Multifrequency radio observations of 4C~35.06 with the Giant Meterwave RadioTelescope (GMRT) at 610, 235 and 150 MHz reveal a system of 400~kpc scalehelically twisted and kinked radio jets and outer diffuse lobes. The outerextremities of jets contain extremely steep spectrum (spectral index -1.7 to-2.5) relic/fossil radio plasma with a spectral age of a few$\,\times (10^7 -10^8)$ yr. Such ultra-steep spectrum relic radio lobes without definitivehot-spots are rare, and they provide an opportunity to understand thelife-cycle of relativistic jets and physics of black hole mergers in denseenvironments. We interpret our observations of this radio source in the contextof the growth of its central black hole, triggering of its AGN activity and jetprecession, all possibly caused by galaxy mergers in this dense galacticsystem. A slow conical precession of the jet axis due to gravitationalperturbation between interacting black holes is invoked to explain the unusualjet morphology.

`Zwicky's Nonet': a compact merging ensemble of nine galaxies and 4C 35.06, a peculiar radio galaxy with dancing radio jets